Some Advise On Bathroom Wall Finish

[moe]

Hi All,

I would appreciate some advise on my bathroom project. It's a 1930s 9" solid brick block wall. The bathroom has two internal and two external facing walls. The internal walls have standard plasterboard finished with multifinish One of the external walls is cement rendered except on the wooden window lintels, the other which is next to the bath is half lime render/half cement render. I've stripped off the gypsum plaster on the external walls and am unsure how to proceed.

Should I patch up the lime render with limelite/Hardwall and straighten the lot with multifinish or do I need to remove the lime render altogether, being external walls I'm concerned about condensation.

TIA

 

[AD Ceramics]

Hiya Mo

If it was my bathroom I'd rip the lot off and start fresh pal, but it depends what you are intending to do in there and what sort of budget you have for the job.
When I did my wet room I ripped the lot off battened the external walls out and insulated them all nice and plumb, flat and hides all pipe work and electrics.

 

[moe]

AD C thanks for your reply.

I'm not looking to cut any corners, just want the job done properly. The cement render is pretty solid, there's no way its coming off. The lime render is blown in some places and will need repairing. Would suspending an insulated plasterboard be better then a float and set cement wall as this seems to be quite contreversial issue on this forum.

 

[White Room]

I would also remove the lime mortar, dry lining would be my preference as insulated boards tend to be 8x4's where as plasterboard can be purchased 6x3's which are a lot easier to handle.

The external walls would need to be isolated as in all holes gaps in windows need to blocked to stop any cold air flow behind the boards thus cutting down on condensation.

 

[widler]

Just knock it off and start again, the walls won't be straight and flat for a start off, for the sake of a few hundred quid do it right moe, it will make your bathroom last and look the dogs

 

[thompsonbrown]

Check the weight of the tiles your about to use, This will give you information needed on preparation of you walls

 

[Dougs Third Go]

as mentioned already, I'd be removing the old lime plaster and dot and dab 12.5 mm plasterboard, tank and tape it and you're ready to go

 

[moe]

thanks for all the reply guys.

I'll take off the lime render but the Cement render is so solid its impossible to remove. I've updated the photo, the bit in red is the lime mortar the rest is cement, somehow this need to be brought up to the same height as the cement render. The issue I have is it seems a shame having the rendered all the walls to board finish aswell but as Widler mentions the walls arent't straight enough for tiling.

Whitebeam, that's a good point regarding isolating the board and window reveal.
Thompsonbrown , I plan to use 8mm ceramic tiles 248 x 498

 

[moe]

Here's the other external wall that is already fully rendered, I'm currently waiting for a replacement window before I proceed. Once again I've taken off all the bonding that made it straight enough to tile.